A dead jellyfish found on Long Beach, Mississippi, nearby a large amount of the aforementioned thick, brown foam, was tested and found to contain 15 ppm of ethanol, one of the chemicals in the dispersants, along with low levels of n-Butanol, another chemical present in the dispersants…

Based on comparative analysis of Corexit 9500 and the sample collected, the sample appears to contain approximately 500 ppm of dispersant.

A water sample in the same area, taken in an area covered in thick, brown foam, contained propylene glycol, one of the confirmed ingredients of Corexit 9500.

Samples were also taken from a beach in Ocean Springs, Mississippi.

A water sample at this area also contained ethelene glycol, as did a water sample taken from a fish pond in the front yard of a resident's home in Ocean Springs.